Longest spells atop the UFC rankings since 2013

What counts. THIS IS NOT THE LONGEST TITLE REIGN, and it is not trying to be: it counts weekly ranking tables, and the rankings start in February 2013. The longest title reigns in UFC history is the other page, measured in calendar days from the fight that won the belt, 1997 to today. Here, a spell is an unbroken run of tables with the same name on the champion line. Where the archive holds no table for a month or more, the weeks inside that hole are counted in nothing. They are printed on the row that spans them, because a number that quietly skipped them would read as a smaller reign rather than as a quieter record. This is the undisputed title. The source reserves the champion line for the undisputed belt and publishes an interim champion inside the numbered list instead, so an interim reign is not a row here — that is how the tables are published and we have not rewritten them. A reign already running when the first official table was published in February 2013 has no start date here and is marked as such: the record cannot see when it began, so we do not invent one. 1 ranked name is left out entirely — Bruno Silva is shared by two different fighters our source roster cannot tell apart, so any career total under it would be two people's added together. That page is withheld for the same reason. Ties. 4 of the rows below share the same 14 weeks on the published tables. Where two bouts share a value the older one is listed first — the first fight to reach a mark is the one that reached it. Where it comes from. Every number on this page is counted from the official UFC rankings tables themselves — the same tables the division pages let you slide back through, one week at a time, so any row here can be checked against the week it came from. A week is one published table: the UFC has missed weeks, and nothing here fills them in. Each name links that fighter’s own page; a ranked fighter we hold no page for is printed as plain text rather than dropped from the count. Slide back through the tables yourself on any division page.